Ornamental stitch sewing machine



Oct. 25, 1932. F. LUTZ 1,884,027

ORNAMENTAL STITCH SEWING MACHINE Filed April 1, 1930 2 Sheets-Sheet 1 Oct. 25, 1932.

F. LUTZ ORNAMENTAL STITCH SEWING MACHINE Filed April 1 1930 2 Sheets-$heet 2 2 mid 8 3 4' iLQ .5

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3 0.2 ggwventoz seems ea. 25, 1932 @TWTGART, AESIGEMNR 1'6 UNION SPECKAL E'EASQHINEN- G. M. B. EL, @E EBTUTTGAET, GERMANY SEWING MACHINE messes teem es zfi led 15m?! 183D, lie. 449,782, smi in Germany may 4 19%.,

The invesiieis impzrevemeiiis is so periieeiesiy imes oi siieei es Iiifiilfi sm ieee and useiei 12 md connecte& through en eceeniric sires es, and moss i7 Wlih an eccentric onjihe main shsf; I8, Goopereimg with the needle beneath the Work support is a thread (321322711151; iooper 19 piv= oied at 20 to s iooper rocker 21. This seeker J A31 es 1?" is osciiieted in the usual way to give e needle meeiiiiie avoidin movement to the ioopei and the ei ieoper 1s oscillated on fiche rocker so as to ei is move the same into and out e55 the needle a 1 ih eegi l oop. 1 q "seeeiige a common his is accomplishes Say a, pen." of illiiis 22 ihe peeeiie eosep end which are pivoseiiy connected at 2 a w a is 23 is aivoied st 25 to the needle ievei' As the needle ievei' extension h "h ee iiiliiS 22 and 23 1M; will 5 io if in vibrates, A, imperi osci; gees 13 is me means of link the upper end e sleeve 39 mos. fixed shsie 3i ions on e pivotsi and is The sleeve 30 is esci o means of a roller 28 which is edjusiehiy eai-= Tied by the lever aim This roller 28 was 1 in s pattern cam 35. This pejitem care 35 is formed in the outer face of e drum 36. The drum is made in two sections. The section 366; is provided with e cam groove and this section 38a is secured by hoiis 37, 37 to the driven seetion of the drum 362:.

The ciriven seciion 365 carries a hub 38 which is mounted for free rotation on e supporiing siuci 39 mounseei in the siendesci mowing the overhanging arm 12 The driven section 352) is provided with an internal a sewing, 40. A inion il meshes with this intemei v to e oafiern p v :0 1 gees. Attached to end roteung with the die eivi iooper m T 4- 1 ion 42 which meshes WIh e, i ornementmg plump Is a p n l 51% poffien pinion 4:3 eerrieci by the main shaft? 18. This a plmon 1S readiiy detachable from the shefi;

211d other pinions may be substituted therefor, Likewise the pinions ll and 42 may he removed end a pinion of difieiens size suhsituted for the pinion 42. As the main shefi rotates it will rotate the pattern drum emi the timing of the pattern drum relative to "the The es iiiesti'steci inehicies ssupporting bed 11 carrying an overhanging arm 12 on which is mounted e needle gate 13. A. neeciie he? 14 reoiproeeies in this neeciie gate, The heedie'ioar is reciproceted by a needle levee i5 pivoted m; 16 to the overhanging arm stitch formation may be changed by these interchangeable gears just referred to. By the chan ng of the timing of the drum is meant a c ange in the number of complete rotations of the main actuating shaft foreach rotation of the drum so that while the number of complete stitch cycles is changed, the timing of the lateral shifting of the needle and looper relative to the feed is not changed.

By the use of an internal gear the drum may be made relatively large and still placed underneath the needle lever. This enables the pattern drum to be relatively large in diameter.

The pattern cam 35 may be of any desired shape. The section 36a carrying this pattern cam may be readily removed and a new tion substituted therefor having a differently shaped pattern cam. This is accomplished by removing the bolts 37 and this is all that is necessary. As this pattern cam rotates, the roller 28 following the pattern cam will change the position of the lever arm 34 and this through the link 27 will change the position of the needle gate 13 and thus the needle is shifted laterally of the line of feed.

The feed dog is indicated at 44 in the drawings; the needle M45. The presser foot which holds the material on the work support is indicated at 46. This shifting of the lever arm 34 to set the needle gate at a fixed position also through the arm 33 will raise or lower the pivotal connection between the links 22 and 23 and thus either lengthen or shorten the distance between the pivotal connection 25 of the link 23 to the needle lever extension and the connection of the link 22 to the looper and this will, of course, shift the oscillating position of the looper. The extent of oscillation imparted to the looper is precisely the same, but the field or position in which it oscillates is shifted to correspond to the shifting of the needle. Thus it is that through the 'one common -operating lever and a single roller running on a pattern drum, both the needle and looper are shifted laterally of the line of feed and the extent and timing of the shifting is determined by the pattern cam.

In Fig. 4 of the drawing the pattern cam is shown in its full development and the roller 34 is at the position indicated at 1. This is the position of the first stitch formation in Fig. 5. As the pattern cam rotates, this roller 34 will take a position indicated by the broken lines at 2; and during this time the 'roller has shifted laterally of the'pattern drum so as to cause the needle and looper to shift and make a stitch 2 in Fig. 5. The stitches which are formed durin a single rotation of the drum are indicate by the positions 3, 4, 5, 6, 7, 8, 9 and 10.

The drum is so shaped as shown in Fig. 5 that the stitches 4, 5, 6, 7 and 8 are all in a line the same lateral distance from the initial position of the needle. At 1 again the needle more Or less of a scallop is in' line with its initial position. Thus it is that a line of stitches may be produced which when located at the edge of a fabric will give formation. The stitches from 4 to 8 may be over the edge and interlocked so as to form a chain of stitches extending from the third stitch to the ninth stitch.

In Fig. 6 a stitch formation is illustrated which requires a changing of the pattern drum and also a changing of the timing 0 the drum, as in this stitch formation there are eight stitches to each cycle and the pattern cam has been altered so as to produce this shifting back and forth of the looper.

In this form all of the stitchesmay be enchained and placed over the edge of the fabric except stitches at the points indicated at 1, or all of the stitches may be placed in a fabric for ornamenting the surface of the fabric. In the pattern shown in Fig. 7, the same timing of the drum is maintained but the pattern cam is again changed so as to produce different characteristics in the lateral shifting of the needle and looper. In the form of ornamentation shown in Fig. 8 the cycle has again been changed by the changing of the timing of the drum relative to the stitch formation so that six stitches are formed for each rotation of the drum. The pattern cam is also changed to give a different type of lateral shift to the needle and looper.

'In-the ornamentation shown in Fi 9 the timing of the drum has again been 0 anged so that during each cycle there are only two stitches. Inasmuch as the stitches are sym-v metrically disposed, that is, merely moved first laterally in one direction and then laterally in the other direction, this may all be accomplished by the attern cam without chan%i ng the timing 0 the drum.

In i 10 the timing of the drum has been change so that five stitches are produced for each rotation of the drum and the attern cam is shaped so that only every stitch is placed laterally to one side of the other stitches which are in line.

It will be understood that other forms of ornamentation may be accomplished by the interchangeable pattern drums and the ing of the timing of the drum, and it wi throu h a very sim le mechamsm for shifting t e needle an looper laterally which includes onlya single lever arm and a single roller running in the pattern cam. Only one pattern cam is necessary This not only greatly simplifies the structure, but provides uniformity m the lateral shifting of the needle and looper.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is:- v

1. The combination of a needle, means for noted that it is all accomplished needle and looper,

; mechanism for shifting t supglortingasaid needle whereby the same ma bes fted terally,alooper cooperatin vi the needle, means for oscillating said Fooper and for permitting the oscillating 'tion of said'looper to be shifted a feed dog, and mechanism for shiftin the needle reciprocating position and the ooper oscillating sition laterally of the line of feed, a sectional attem drum, one of said sections being d zatachablyconnected to the other and having a pattern cam formed therein, means actuated b said pattern cam forcontrolling the stitch forming position of the the other section of said drum having an internal driving ar, an actuating shaft, and interchangeab e gears between the actuating shaft and the internal gear of the drum.

2. The combination of a needle, means for supportin said needle whereby the same ma he shiftediiterally, a looper cooperatin wit the needle, means for oscillating saidfooper and for permitting the oscillating position of said looper to be shifted a feed dog, and

he needle reciprocating position and the looper oscillating position laterally of the line of feed, including a hub mounted for rotation, a drum section carried by the hub and having an internal gear andan interchangeable section bolted to said first-named section and havin a pattern cam therein, means actuated by t e pattern cam for controlling the stitch forming position of the needle and looper, an actuating shaft, and interchangeable gears operated thereby and engaging said internal gear on the drum for rotating the drum.

In testimony whereof, I afiix my si ature.

. FRIEDRICH L includmg 

